^• Wagner, Steven. 2008. “Britain and the Jewish Underground, 1944–46: Intelligence, Policy and Resistance” MA Thesis. University of Calgary. Published online at University of Calgary Library. "Archived copy". Archived from the original on 2011-07-06. Retrieved 2011-01-04.CS1 maint: Archived copy as title (link)
^Andrew, Christopher (2009) The Defence of the Realm. The Authorized History of MI5. Allen Lane. ISBN978-0-7139-9885-6. Pages 355,356.